Grab-bucket.



H. P. ANDRESEN.

GRAB -BUOKET. APPLICATION FILED JULY 30,1908.

Patented May 11, 1909.

2 SHEETS-SHEET 1* wi uesscs:

11. P. ANDRESEN.

GRAB. BUCKET.

'APPLIQATION FILED JULY so, 1908.

Patented May 11, 1909.

2 SHEETS+SHEET 2.

Wd'iwaea' UN TED T S PATENT 41F HERMAN; 1 ANDRESEN; oF CHICAGO, ILLINOIS, ASSIGNOR o ONE-HALF To DAVID J. Evms,

v OFOHICAGQILILINOISQ')U enss nnemm v 1 mieeno wf L g specificati oh ofLette s Patent; Patented may 11, woe.

Application xiieurui 30,1 Serial N .}44e,1es.

Tdcllivkomttmoy eo itce'm: s usustlly referred'to as a" closing mechanism-is j Be,itjknfownthzit l; If'IERl YIAN PVAN DRESEN, i arrangedbetween the scoops and is held. ins e citi z'en of thefUnitedStetes; and resident of frame to which also, the scoops are attaeheei. Chicagocook countj,Illinois, have hiv'ented The I'opening. mecha'nis'm comprises erms certain nejw and. 11361111;- l mpl 'o-vlements in [which extend from respective scoopskend e0 "@Gritb-Biickets; of which ,theifo-llowing is' a leither chains'orv links connecting saiderms I I tlem, p ei for operation by asingle hoisting cable, the fimvehtioh relates to "f roi rements in. same operating afterthe manner'of a toggle I g'rebijbiic ijet's "and..lies" specia-g-referenceyto lever. Another. hoisting "cable is wound .10 improvements inTbii ehtsof-the class which upon. apportion of the differential winding I 30 the 'n'fl iy two h re 1,: equipmehts or hoisting j ,s re .cha;racterizedf y n ehanisms that are mechsnisnn When the cable first'refen'ed f .adit'pted to hot 1) tively open-zen-dyposieg to is'placeclintensioiythebucket is-therby' .ztive ytlb'sethfl v Z 1- 1 opened andwhen thesecondcable is placed 'Elhe dbjectlof my" entionisto providea intension the bucket is' closed. I When both 2' 'owrfnlwidcopeninggriihbucket thatshn'll cables' are placed in tension the members of 70 jestrong end di im'fleflwhichshell have the ibucket'retain the positions which they maximum osingiend dig'ing powemwhic'h, have assumedttethe llEStitIlt. The closing likewise;she be'p'ifoyidedwithpowelful and i cable may/:be 'used alone-fonhoistin'g the eifeetive ,openin' meins s im leconstruc hucketQbut ass rule both cables are usedlfor getionf'ztnd' lrin w ieh thefrfietitl or material thepurp'ose; H t p "'sL-lu'tllbe distributed inemennerbest adapted- Referring now tothe drawings for the '(le. 'td'thephi os'esef strength -durahility, ight tails of theconstructionfof that form of my Weightlin EIQtVcbstL I 1 f' v g inventionlwhich llprefer, itwill-be seen that Agfunther spe'ciztlobjectoiniyinvention is I the grab bucket comprises three rincipal t somodify 'thegrebbuclietfdescribed and niembersnamely, the frame A- sim thetwo' "81) claimedin Letters-Patent vNo." 870,812 fha-lves' or scoops :B B-f The frame coin- "gr'ante'd to me No i/ieinher 1 2 1907ythat the prises the triangular ertical members, a a, same may be operatedesye two line grab in two pivot shafts, 71/50, connecting the tops i otherwordgitoadapt thebucket'for usewi-th ofthe members, cad, and'a third shaft,-a;

which connects the lower ends of the mem 85 "th'at'sii e-hipresenthse-throughout the bers, (P-a, and supports the differential country. 1 w v windingjdruni lG. --Each scoop, B, is a rigid :My invention consists in a'gr a-b bucket of structure, comprising side plates, b--b, 't he substantially the'constrnction nd combineback late, b; and a, scoop oi'shovel section,

t ss -tion ofpgtrts -hereinafter described and parb he ends oftheshafts, a-'a-,proje'ctbemend inf ticulerly pointed out inthe cla-inis. i v yond res ectivepla-tes, a-va, and upon these i My inventionf will be more readily-onderf I pivot 15 1e upper endsof respective scoops, stood. by reference {to the; aceompanyin'g (B -R: The scoops mztyeither be fastened drawings forming' a pertlof this speci'lcsttiori, f to. their shafts, a,' or-the shafts may be se-' .ic huredinthe frameplates,'ar -a,"orthe shafts ;Fi-giiretl is eplenfviewtofla, grsiffhlrcket ineybe free to rotate with respect to all of exhbodyingirnyinvention-{Fig.2 isfla'vertical theseparts. In this form of. my bucket'the s ectmnon tlielineofll ig. 1;}; Fig.3,ise shafts are not subjected to torsion for the .iesb ev enlargedhorizontelsection on theg fmrpose, of opening the bucket but"'serve 4s lineY i o Fi Figl 4;is a vertical sec- {simply as connecting parts of'the frame and 'tion'o" the lineZ Z0f F-ig.- 3,; andF-igsfi f as pivots between theframe andt'he scoops.

ands

y L ldeta il y; ws of rnedifi ed pulley p011 thebackand' 's t the top of each scoop. 'bloel tconsti'oetion v H v .1"; 7 5 .x{ v, ;is anropening arm, D; composed of two bent illy" i 1;n rovefl lgr fbt bucket is, especially plates, d,-connected by s pert d and having QOiil- 'o ie and other their-ends, 01;, rivetedto the side. plates, b,

1 @corn risesflof the'scoopfi Chains orlinks, (I -d, con

ic ereinecte'dx by n link or ring, d", have-their ends heavy, bulk nmteriels, L It sue l ,two scoops o1- bucket, pertipns,

Ea siiigle iqeceptaclc; when l atticlfedto respeetivefparts dfl, bf'the this; or c -itti g' fedges"are;broughtto-v 1,1). 'llhejbentplates or armsiseryte toqoh difleregtial wi dingjinflfihemsm, theisicies Of'iI'QSPGGT/i-VQ'BGOQPQ and they also i tached to or bear upon the shafts, cc.

' o'r uards, 0 upon the back p The arms, D, and the chains or links, constitute the opening mechanism of the bucket and the hoisting or opening cable, E, is at tached 0 the middle ring, link or stirrup, d. When the weight of the bucket is suspended upon this cable it is obvious that the ucket will fall between the endsof the toggle lever made by the two chains, (1, and the tendency being to draw the arms, I), into alinement with the chains, the scoops, B, are opened, until the bucket assumes the ap .pearances represented'by the dotted lines in 1- 9 Y Y The differential winding drum, C, clearly shown in Fig', 4 comprises the large drum or sheave, c, and the two small. drums .or Sheaves, 0 These parts are integral and the drums, 0 extend into engagement with the frame plates, a-c.. I prefer that the'drum shall be hollow and that the bearings-upon the shaft, a shall be, restrictedt'o t 6' ends thereof, adjacent to the plates,- a-a The sheave, c, is preferably grooved -or' providedwith flanges, 0 to retainthe closing cable, F. As a'further means of preventing excessive slacking of the cable, F, and its displacement from the drum, I em loy a channeled semicircular member or ca hle guide,

handled and" saves the cable from much wear; .The'closing cable, F, passes upward from the drum, 0, around the guide ulley, ffiwhich holds the cable in line with t 1e vertical central axis of the bucket. The pulley,

f", isheld" by a short; shaft in the guardlates, f f,- secured on the shafts, cc. n some cases I employ single line or strand connections between the small winding drums, cc and the scoops, but for the purpose of multiplying the closing force of the scoops, I usually prefer the chain or cable loops, c ,'and the pulleys, 0 shown herein. These are duplicated on opposite sides of the large drum, 0, that is, a pair of winding chains are provided for each scoop. As shown in Figs. 1, 2 and 3 the pulleys, 0*", are placed on arge shafts, c", in respective scoops. The ends of these shafts extend thropgh the sides, I), of the scoops. Brackets ates, I), serve to old the pulleys and chains in place. Each small drum, 0, is provided with two lugs, "c and 0 on oppositesides, to which the chains of the opposite scoops are attached.

7 Thisis apiece of channel iron bent to fit t e drum and 1s supported, between the flanges thereofv by tie-rods, f, having: their upper ends looped One or both off This- .ment of the scoops is insured.

' the underside of the drum, thence around the pulley and thence to the fastening, 0". The chain, fastened to the lug, c, is wound upon the innerend of the drum, c and passes from .thetop thereof to the pulley on the scoop and thence ,to the fastening, a on the link or collar, 0 The chains are of substantially equal length and when the drum is turned-in one direction the chains are wound thereon and the scoops are closed together.

infected through the drum is taken by the ring. or link, 0, interposed between the ends of the opposedchains. The ring being loose -.on the drum freely adjusts itself to the changing angles of the chains and being balanced on the drum operates without friction there- 'on. By dead ending the chains upon thering the full advanta es of the two to one pulling effort of the c ain loops and pulleys are secured. This could also be done by simply connecting the ends of the opposed chains beneath the drum, 0", but their connection to the ring or link, 0", is preferred for the reason that the ends of the chains, are

thus relatively fixed and thereby equal moveln this regard my winding mechanism may be said to comprise and perform the functions of an equalizing mechanism. In constructing buckets of more than ordinary size and capacity Isometirnes find it desirable to substitute for the shafts, c", of Figs. 1, 2 and 3 one or the other of the modified forms of the structural framing shown in Figs. 5 and 6.

In Fig. 5, g-g, represent beams which extend between the sides of the bucket and gg are blocks arranged between these beams and holding the pulleys, c Obviously these parts comprise a strong and rigid structure capable of withstanding the strain which is put upon the pulleys, 0 For somewhat smaller buckets I employ the beam, 9 .shown in Fig. 6 and pulley blocks, y the latter being attached to the beam by means of swivels, g, which permit the block the necessary freedom of movement with res set to the cross beam, 9

i he operation of the herein described rab bucket is as follows: When the bucket is held sus ended by both cables it'may be raised an lowered without changing the positions lOU in the art, I specific structuresherein shown and de such time the weight of forcedv apart or open;

i practically constitute toggle lever, substantially as described.

said scoops, a closing/cable connected with ends connected to respective scoops an said toggle lever,

- closing cable connected with said mechanism,

ended it maybe osing cab1e,*l?,jor; up on the; opening cable, At" thebucket, plus the weightof. theload: therein, if any, is exerted upon the scoops through the .powerfulleven age of the toggle chains orlinks, (i and the arms, D, with the result that the scoops are In this conditionlthe bucket 1s dropped uponthe material'to be of its members. While sus opened by slackening thec by drawing excavatedandhoisted and thereupon the opening cable. is.- slackenedand the closing cable, F, is drawntaught. 'Theldrawing out of the cable, F, causes the rotation of the differential winding drum, thus winding the chains on the small drums, c and powerfully closingthe scoops together upon the load.

.As 'hereinbefore explained the. chains, a tog le' leverof which, d, is the middle pivot or eeand as the chains may be replaced by links or toglgle lever sections, I have hereinbefore ands all hereinafter refer to th'ejsame as a toggle lever which joins the arms, D'-'-D, and to the knee of which the closing cable is attached.

As various modifications of myinvention will readily su gest themselves to oneskilled db not confinethe same to the scribed. a 7

Having thus described my invention, .1 claim asnew anddesir'eto secure by Letters Patent:- f v f 1. A grab bucket comprising: pivotally joined scoops and'a frame, in combination with a closing mechanism arranged u on said frame beneath the pivoted ends of sai scoops, arms projectin from, said scoops, a toggle lever abovesai' scoops and frame and pivotally interposedbetween said arms andan opening cable connected to the knee of said 2. A grab bucketicomprising-a frame, in combinatlon' withiscfoops' ivoted thereon, a

mechanism carried by sai frame. for closin said mechanism, a --;to'gg le lever arranged above said scoops'and frame andhaving-its an opening cable connected with the knee of,

substantially-"as 3. A grab bucket comprising aframeyin combination with scoops pivoted thereon, I I said frame beneath the pivoted ends of; said scoops, a

arms projecting from respective scoops'adjacent tothe pivots thereof, toggle" linksjoined by a suitable knee and having their ends attached to respective aims in the plane substantially bucket :and an opening cableattached to the knee. or common pivot of said links, substantially as described. i 4. A'grab bucket comprising a. frame, in l connecting t J ends pivoted thereon, C said scoops,v :tlie scoops opening cable attached to the knee of said g level", a differential winding drum arranged in said frame below the pivots of the scoops,

- of said differential describe d;-

includ ng the vertical axis of the l c0mbination -with scoops pivoted thereon, the pivots ofsaid scoops belnggiarallel, arms projecting fromsaidscoops a jacent to respective pivots'thereof, a chain extending across thet'o- ".of said frame and scoops and fie outer ends ofv said arms, an opemngjca-ble connected with the middle linl rof said chain,.a closing cableand a suitable closing mechanism interposed between said scoops, substantially as described.

' 5. A'grab bucket comprising two scoopspivoted. at their 'upperiends, in combination with arms projecting fromsaid scoops, a toggle lever extending across the top of said scoops and joining the ends oisaid arms, an-

I nee or nnddle gle lever, a closing cableand opening cable attached toi'the p vot of said to a suitable di erential closing mechanism interposed between said scoops for operation by s'aid closing cable, substantially as described. I

6'." A grab bucket comprising frame members, in combination with parallel shafts or scoops having their upper pivots thereon, ends attached to respective pivots on the frame members, a differential closing mech-' anism' supported joining said scoops, beneath said pivots, bent plates attached to the upper ends of said scoops and forming arms thereon respectively, saida'rms having their ends in a common plane with the vertical axis" of the bucket, a tog le device above the frame and scoops and connecting the ends of said arms, an opening cable connected with said toggledevice and a closing cable connected Wit said closing mechanism, substantially as described. v

' 7, A grab bucket comprising a frame, in combination with scoops having their upper arms projecting from a toggle lever arranged above and connecting 'saidarms, an

a closing cable wound upon the larger part drum, pulleys upon respective scoops beneath the pivots thereof, .w-inding chains or cables attached to the smaller portion of said drum and passing over respective pulleys and a link connecting the ends of said winding chains or cables, substantially as described.

8Q A-grab bucket comprising a frame, in combination with scoops having their upper ends pivoted thereon, arms projecting from said scoops, a toggle lever arranged above by said frame members and the scoops and connecting said 1 arms, an

opening cable attached to the knee of said ever, a differential wfiiding drum arranged in said frame below the pivots of the scoops, a closing cable wound upon the larger part of said differential drum, pulleys 'Jupon respective scoops beneath the pivots" thereof,

smallerrportion of said drum and winding chains or cables attached to the and small drums, a pair of pulleys on each scoop, winding chains or cables having their ends attached to said small drums and pass ing around respective pulleys, links or collars journaled on said small drums and whereto' the dead ends of respective winding chains or cables-are attached, substantially as described.

10. A grab bucket comprising scoops andan opening mechanism, in combination with a drum arranged between said scoops, a closing cable wound thereon, a small drum attached to the first mentioned drum, pulleys on saidscoops, a link or collar journaled on said small drum and winding chams or cables upon said pulleys, each said cable having one end attached to said link or collar and its other end attached to said small drum, sub- I stantially as described! figs 11.. A grab bucket comprising a frame, in combinationwi-th scoops pivoted thereon, a suitable opening mechanism, a differential winding drum supported by said frame beneath the pivots of said scoops and composed centrally posiolf two small drums and a tioned large drum, a guide centrally positioned between the tops of the scoops, a closing cable held by said guide and wound passing l l r l upon said large drum, a link or collar upon each small drum midway of its ends, pul eye on said scoops and Winding chains or cables on said pulleys having their ends attached to respective drums and links or collars, substantially as described.

12. In a grab bucket the scoops in combination with a winding drum positioned bctween said scoops, pulleys on said scoops, a collar on said winding drum, chains passing over said pulleys and having their ends at tached to respective sides of said drum and said collar and means for rotating said drum, substantially as described.

13. 1n a grab basket, pivotally connected scoops, in combination with a differential winding mechanism arranged between said scoops and including a flanged cable drum a curved cable guard or gage arranged beneath said drum and between the flanges thereof and means for supporting said guard, substantially as described.

14. In a grab bucket, a frame in combination with scoops pivoted thereon, an opening mechanism, a closing mechanism supported by said frame beneath the pivots ol' the scoops and including a flanged drum, a closing cable wound on said drum, a curved channel conformed to thelower side 01' said drum and arranged between the flanges thereof and tie rods connecting said frame and channel, substantially as described.

1n testimony whereof, l have hereunto set my hand, this 24th day of July, 1908, in the presence of two subscribing witnesses.

HERMAN P; ANDRESEN. Witnesses:

M. Simon, JOHN R.-Lnrnvnn. 

